everett l



(No Model.)

B. L. LAKE.

REAMER.

No. 318,994. Patented June 2, 1885.

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EVERETT L. LAKE, OF SYRACUSE, NEW YORK.

REAMER.

SPECIFICATION forming part of Letters Patent No. 318,994, dated June 2,1885.

Application filed February 27, 1395. (No model.)

To all whom it may concern.-

Be it known that I, EVERETT L. LAKE, a citizen of the United States,residing at Syracuse, Onondaga county, New York, have invented a certainnew and useful Improvement in Reamer-s, of which the following isespecification.

The elements of my invention are a holder of peculiar construction, oneor more circular cutters to be held therein, and means for adjustingsaid cutters axially and laterally.

The objects of my invention are to obtain in reamers, first, a freshcutting-edge without grinding or changing the size of the cutters;second, the largest practicable amount of out ting-edge on each cutter,and, third, 2. practical means of adjusting or varying the swing of thecutters, so as to determine the size of hole when reamed.

In the accompanying drawings, Figure l is a. view of my improved reamerassembled. Fig. 2 is another view of the same, more particularly showingthe slot f and split 9, described hereinafter. Figs. 3 and 4. arecrosssections of Fig. 1 at the line as. Fig. 5 isanother view of thereamer assembled, showing an arrangement of details somewhat differentfrom Fig. 1. Fig. 6 is a cross-section of Fig. 5 at a: Fig. 7 is across-sectional view of the reamer, showing the same in aforni adaptedto the use of a single cutter. Fig. 8 is a side view of the cutter inFig. 7.

Similarletters refer to similar parts throughout the several views.

In the several views, A is the holder,which is provided with a slot, f,for housing or containing the cutters, and a split, 9, whereby it ispossible to close the sides of the slot f against the cutters by meansof a grip-screw.

In Figs. 1, 2, 8, 4, 5, and 6, a a are the cut ters, which are circularin form and square faced on their periphery. It will be seen that thesecutters are placed on either side of the center of the holder, so that,notwithstanding they are square-faced on their periphery, but one lip oredge is in position to cut. The cutters are also hung eccentrically tothe center line of the holder, and each of them on an independenteccentric set slightly'quartering one to the other. When theworking-section of each cutter has become worn or dull, the

operator should turn the cutters on their axes a sufficient distance topresent a fresh section to the work. \Vhen the cutters have become wornall around on one edge, they should be so shifted as to presenttheunused edge to the work.

In the above figures a clearancegroove, e e, for chips is shown.

In Figs. 1, 2, and 3, 11 indicates the eccentrics 011 which the cuttersare hung,and whereby they are held off toward opposite sides of holder.A gIlPSCIGW, 0, passes through one side of the holder and on through theeccentrics b, on which the cutters are hung, and is threaded into theopposite side of holder, the efi'ect of which is obvious.

In Fig. 4 a bolt, h, with eccentrics turned on its body, and anut, t,are shown. These are designed to show another way of suspend ing andtightening up the cutters.

In Figs. 5 and 6 another way of suspending and gripping the cutters isshown. This consists of a differentially-threaded hollow screw or nut,m, and a grip-screw, 7s. The hollow screw or not at is threaded on itsout-side to fit into a corresponding thread in a recess in A, and on itsinside it is threaded to fit onto the threaded end of k. The innerthread of m is finer than the outer one in a ratio of two to one. On theinner end of m an eccentric is turned, which forms the journal or axisof one of the cutters, and on the body of la is turned an eccentricwhich forms the axis of the other cutter. Around the recess in A whichreceives the nut in are graduations indicating. the throw of theeccentric on m in divisions representing one-thousandth parts of aninch. (See 9'', Fig. 5.) A similar scale (not shown in drawings) isprovided around the head of It. By the proper manipulation of it and m,in combination with above-mentioned graduations g, the operator may notonly grip the cutters a a, but also throw them a few thousandths of aninch out or in, and so vary the diameter of the reanier.

Fig. 7 shows the reainer adapted to a single cutter. In this instancethe reamer cannot of course be expanded, as above. The cutter a is hereshown backed 03 one way on half of its perimeter and the other way onthe other half, the object of which is clear.

In Fig. 8, a is another View of the single cutter, and 0 is the hole insame for the gripscrew to pass through.

Having thus described my invention, what I claim, and desire to secureby Letters Iatcut, is

1. In reainers, an adjustable circular cutter, in combination with aholder, substantially as described.

2. In reamers, two square-faced circular cutters placed side by side ina holder, in combination with means for adjusting them axially,substantially as described.

3. In reamers, two square-faced circular cutters placed side by sidein-a holder, in combination with means for adjusting them laterally,substantially as described.

4. In reamers, two square-faced circular cut- EVERETT L. LAKE. Wi tnesses:

, ALBERT E. DoRsEn,

J. G. CHAMBERS.

